text: By noon on May 20, authorities traced 79 F1s at the company involving many districts, towns and cities in the province?
classes:  No, 79 related F1 cases were detected in one district of the province, after anti-epidemic forces conducted investigations.  Also, 79 related F1 cases were detected in one district of the province, after anti-epidemic forces conducted investigations.  Yes, 79 related F1 cases were detected in one district of the province, after anti-epidemic forces conducted investigations.